Metal-bending machine.



P. W. MILLER.

METAL BENDING MACHINE.

APPLICATION FILED NOV. 23. mm

Patented Nov. 25, 1919.

3 SHEET$-SHEET I.

P. W. MILLER.

METAL BENDING MACHINE.

APPLICATION mmnov. 23. I916.

1,322,926., Patented Nov. 25, 1919.

3 SHEETS-SHEET 2.

P. W. MILLER.

METAL BENDlNG MACHINE.

APPLICATION FILED N0 \l.23.1916.

3 22,926, iatenred Nov. 25, 1919.

3 SHEETS-SHEEI 3.

ETNTTED TATES PATENT @FFTfi PERCE W. MILLER, 03 IMGKEESPOR'I", PENNSYLVANIA.

METAL-BENDING MACHINE.

Specification of Letters Patent.

PatentedNov. 25, 1919.

Application filed November 23, 1916. Serial No. 133,028.

Bending Machines, of which the following I is a specification, reference being had therein to the accompanying drawing.

The invention relates to a bending ma-- chine, and more particularly to the class of sheet metal bending machines.

The primary object of the invention is the provision of a machine of thi character wherein sheet metal in strip form, when fed therein, will be automatically bent and shaped into a tube, pipe or the like, and the seam of the strip will be overlapped for the welding of the joint. when the tube, pipeor the like has been delivered from the machine.

Another object of the invention is the provision of a machine of this character wherein the forming rolls are of novel construction and are arranged in successive order for the complete bending of .the material into tube or pipe form when fed thereinto and prior to the delivery of the same from the machine, so that the welding operation is only necessary on the delivery of the tube or pipe from said machine.

A further object of the invention is the provision of a machine of this character wherein the cores or dies and the shaping elements are of novel form and positioned in a novel manner within the machine so as the machine, the shaping of the materialinto tubi-form being efiected in a single operation of the machine for the subsequent welding proces after the shaping of the material.

A. further object of the invention is the provision of a machine of this character which is simple in construction, thoroughly tion reliable and eflicient in operation, and inexpensive in manufacture and installation.

Other objects will be in part obvious and in part hereinafter set forth.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction hereinafter described, and the scope of the application of which will be indicated in the ap pended claims.

In the accompanying drawings:

Figure 1 is a side elevation of a machine constructed in accordance with the inven- Fig. 2 is a top plan view thereof;

Fig. 3 is an elevation of a pairof the forming rolls at the feed end ofthe machine; I

Fig. 4: is a similar view of another pair of the forming rolls;

Fig. 5 is a similar view of another pair of the forming rolls at the delivery end of the machine;

Fig. dis anend elevation of the blank sheet material when fed to the machine;

Fig. 7 is an end elevation of said sheet material showing the shape thereof in the initial bending;

. Fig. 8 is an end elevation showing a further step in the bending of the material;

Fig. 9 is an end elevation of the final step in the bending of the material;

Fig. 10 is a perspective view of the guide feed trough and the guard members separated;

Fig. 11 is a perspective view of one of the dies or cores;

Fig-l2 is a perspective view of the form ing trough cooperative with the die shown in Fig. 11;

Fig. 13 is a vertical transverse sectional view through the trough and diev shown in' point, as clearly shownin Figs. 1 and2 of the drawings. The frames B each includes a pair of vertical uprights 10 which are formed with suitable guldeways in which are slidably fitted upper and lower cross bearings 11 and 12 respectively which are adjustable relative to each other through the medium of adjusting screws 13 carrying lock nuts 14: threaded thereon, and working against the cross bearings 12 at opposite sides thereof so that the bearings will be held in their adjusted position; J ournaled in the bearings 11 and 12 are the shafts 15 7 of initial upper and lower bending rolls 16 7 ing of the same to the frame 10 and an arm ,27 forming a guard, the sald arms of both.

and 17 respectively, the same being located centrally between the frames 13. The roll 16" is formed witha convexed periphery 18, while the roll 17 is formed with a concaved periphery 19 30 asv to form companion rolls in {heinitial bending of the strip material 20, which is normally flat and of'the' required length. On the adjustment of the cross bearings 11 and 12 the rolls 16 and 17 can be positioned relative to each other for the proper matching of the peripheries thereof in the initial bending of thesheet- 'material 20 when fed therebetween.

At the feed end of the machine and suitably supported between the bearing frames 10 is a feed trough 21'for thesheet material 20. and this trough is formed with atapered end 22 next to the rolls 16 and 17 having a tip 23'shaped correspondingly to the concaved periphery 19 of the roll 17 so as to properly feed the sheet material 20, from the trough 21 whichis formed with the side,

upstanding flanges 24 which terminate at the point of juncture of the. extension 22 with saidtroughf 'Adjustably mounted upon. the bearing frames 10 are the guide mem bers. each comprising a base 25 having an elongated slot '26 for the adjustable fastenshaping members being disposed in convergent relation and projecting in the direction of the trough 24: tobe dlsposed in the position shown in Fig. 2 of the drawing so that the sheet material 20-advanced in the trough will be guided between the guard arms 27 for the initialshaping thereof into substantially U-form, by the initial forming rolls 16 and 17, as at 28 'in Fig. 7, at the feed end of the machine The guide members at the feed end of themachine can be adjusted laterally toward and away from each other- 32 and 33 respectively, and on these bearings 3 0 and 31 in boxings 3a are journaled the shafts 85 which are angularly disposed in upwardly convergent relation to each other and carry at thier inner ends meshing gears 36 so that motion from one shaft will be imparted to the other shaft, while one of these shafts carries a driving belt wheel 37 1 over which is trained a belt 38 operated from a motor 39 preferably of the electric type and supported at the base A of machine.

Lliu

The shafts 35 have thereon the companion forming rolls a0,,each provided with the single flanged periphery a1 and the jpalr of rolls act upon the strip material to bend the same into the shape, as at 60, shown in Fig.

8 of the drawings.

Located between the rolls16'and 17 and 'the rolls {10 is a guide trough 4:2 which, at

one end, is formed with the tube port1on 43, while at opposite extremities of said trough are the tips at and 15, respectively, which match theforming'rolls 16, l7 and 1 0, said trough 12 being supported between the frames B and Gin any suitable manner, and cooperating with the trough 4:2 is the die or shaper 46' which is adjustably supported through the mediumofscrews' 4:7 and is of theformation shown in Fig. 11 of the drawings, with the end 48 adapted to enter the'tube end 13 of said trough 42 for the initial shaping of the strip material 20 prior to" action of the forming rolls 4:0 thereon to bend the strip into the shape shown in Fig. 8 of the drawings. v H 7 At the delivery end of the machineare the final forming rolls 19 and'5O respectively, the latter beingformed with a concaved periphery 51 while the roll 4:9 is formed with the concaved lapped peripheral portions 52 and 53, respectively, for action upon the strip to finally shape the same as at 5-1 in Figs 9 of the drawings on thefde- I livery thereof from the machinefthe rolls 19, and 50 obeing jadjustably supported. by the frames D in a manner similar to the sup porting of the rolls 16 and17 in the frames B at thefeed; endofthe machine.

Located between the frames C and D is the tubular shaper55 formed with the tips.

56 as shown in Fig. 14: of the drawings, and this shaper is adjustably supported'through the medium of'adjusting screws 57, while within thej'shape f55 is a coreor mandrel 58 shown'in Figs. 15 and 16' of the drawings, the core or mandrel being provided longitudinally thereof With a lapped shoulder 59 which accommodates the lap joint of the strip 5st initially before final action thereon by the rolls 49 and 50 Which close the overlapped edges of the strip 54: at the joint for the subsequent Welding of said edges in the Welding process to complete the tube or pipe.

The shafts of the forming rolls 16 and 17 and 49 and 50 carry belt pulleys 61 over which are trained the belts 62 which are driven from motors 63 preferably of the electric type.

In the operation of the machine, the sheet strip 20 is bent from its flat formation into tubi-form or pipe shape from the feed end to the delivery end of the machine, with the overlapped seam Which is Welded in the Welding process after the delivery of the completed tube or pipe from said machine.

The core or mandrel 58 is supported at any suitable noint from the machine so as to be positioned within the shaper 55 for the final feed of the strip material to the forming rolls 4L9 and 50 and the subsequent delivery of the completed tube or pipe from the ma chine. The frames 0 are adjusted laterally on guides 6% upon the base A so as to properly position the forming rolls &0 in their companion relationship to each other.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the herein described metal bending machine Will be readily apparent and, therefore, a more extended explanation has been omitted.

Having thus described my invention, I claim:

1. In a tube bending machine, a guide trough provided With opposite tip extremities, pairs of forming rolls arranged at the extremities of said trough, the tip extremities of said trough being shaped to match correspondingly the forming peripheries of said rolls, a tubular portion adjacent one extremity to assist in the formation of a metal blank subsequent to the action of one pair of rolls and prior to the action of the other pair of rolls thereon, and a die or shaper overhanging the trough and cooperating therewith.

2. In a tube bending machine, a guide trough provided with opposite tip extremities, pairs of forming rolls arranged at the extremities of said trough, the tip extremities of said trough bein shaped to match correspondingly the forming peripheries of said rolls, a tubular portion formed on said trough adjacent one extremity to assist in the formation of a metal blank subsequent to the action of one pair of rolls and prior to the action of the other pair of rolls thereon, a die or shaper overhanging the trough and cooperating With the same and the tubular portion, and means for adjusting the die or shaper relative to the trough.

In testimony whereof I affix my signature.

PERGE W. MILLER. 

